METHOD FOR DETERMINING OF THE THERMODYNAMIC ACTIVITY OF COMPONENTS ON THE SPHERICAL NANOPARTICLE AND MATRIX BORDER IN THE BINARY SYSTEM Russian patent published in 2018 - IPC G01N13/02 B82B1/00 

FIELD: materials physical and chemical analysis.

SUBSTANCE: invention relates to the field of materials physical and chemical analysis, more particularly to the determination of the thermodynamic activity (hereinafter activity) of components in the nanoparticle surface layer, which is located in the matrix in the binary system under equilibrium conditions. According to the claimed method, two-component alloy is subjected to thermal annealing, containing spherical shaped dispersed particles in the nanometer range in a dispersion environment (matrix). Determining the nanoparticle and matrix composition, as well as the nanoparticle average radius and by the formula: , where , , – thermodynamic activity of the i-th component in the surface layer, nanoparticle and matrix, respectively, σ is the nanoparticle in the matrix surface tension, σ_0i is the nanoparticle surface tension in the i-th component own matrix, , ω_0i, δ_0i – molar surface and the Tolman parameter at the phase boundary α and β of the pure i-th component, r is the nanoparticle radius (radius of the tension surface), T is the temperature, R is the gas constant, , – molar volume of the i-th component in the phase ν (ν=α, β, σ), finding the sought value.

EFFECT: technical result is an increase in the accuracy and informativeness of the data obtained.

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